Start at the bottom?

She possessed, unfortunately, the power of the high, the middle and the low justice over him. That is to say, she could at will stop his allowance and set him to work at the bottom of the fish-glue business of which he had already made mention; a prosperous concern in which she had inherited a large interest from her first husband, a Mr. Spelvin. And though Tubby knew little or nothing of conditions at the bottom of fish-glue business, instinct told him he would not like them.

(from Summer Moonshine, by Sir Pelham Wodehouse)